Network – Page 15 – POFTUT

Category: Network

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How To Configure RIP Routing For Cisco IOS?

Hi today we will look for some networking stuff. Up to now I have not written any routing related technical post. In this article I am gonna show you some simple dynamic routing with RIP protocol. Routing is divided in to two part which one is static. In static routing routes are configured in router by typing every detail of the route and all things configured are used  in routing....

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How To Change Cisco IOS Time

Hi. Today we will look for changing system time and prompt.  You may think that what is the relation between system time and prompt, you are right there is no relation 🙂 . System time is important for network devices because logs get meaning with them and acl, vpn time limitations works truly with them. In order to change the system time we need enable mod not configure but I...

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Tcpdump Tutorial With Examples

Tcpdump is packet sniffer for everyday use. There is lot of packet sniffers but tcpdump differs with his general availability and ease of use. Tcpdump use libcap library which is the core library used for packet sniffing. Here we will look general usage examples of packet sniffing. Be aware that to use tcpdump, tcpdump should have enough privilege and security mechanisms like selinux, apparmor should give permission. Captured data is...

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How To Install and Use SNMP On Linux Tutorial with Examples?

Today we will look SNMP in Linux operating systems. Simple network management protocol named snmp is designed for getting info and setting configuration in it entities. These entities may be switch, router, pc, cabinet, printer etc. Snmp was very popular in 2000s. today it is popular too but used for information gathering. Especially monitoring which will be examined later is made today with snmp. Snmp has an index database which...

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Introduction To Scapy Network Packet Generator

Scapy is a tool for network protocol, package generation and manipulation and showing them in a visual way with graphics and 3D images. There are tools equivalent like hping3 but scapy is very flexible against it. Scapy can manipulate all data of general protocols like IP, Ethernet, tcp, udp etc. If you have a network protocol scenerio you can implement it with scapy and python scripting. I advise to read...

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How To Find External or Wan IP Address Without Browser?

Sometimes I need external IP address of system I am logged on. The general solution is to use browser and search for “what is my address” . And magically google shows the external IP. But if you have no chance to use browser or especially GUI there must be an alternative for this. Here is  a practical solution for this. Using text based browser with simple URL gives the correct...

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Install Dnsmasq As Cache Dns Server

We have a lot of computer in our network. Our network speed is not too much. Sometimes especially in mornings our internet connection slows down. How can solve this with some dns related tricks? Dns is one of the mostly used network protocol. It can effect the internet speed. Making some optimizations will develop your internet experience. Caching is to hold resolved dns queries in our dns server. There are...

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How To Start, Stop, Restart Networking On Linux?

I have changed my network configuration and want to restart to make changes effective. Or there are some problems with my network and I think restarting it will solve my problems. Here we will look how to restart networking service in various network distributions like Ubuntu, Debian, Fedora,CentOS. Get Status Of Network Service We will get status of network with the following command. Debian, Ubuntu, Kali For deb based distributions...

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How To Delete Route In Ubuntu Linux?

I have some route in my routing table. But I want to delete one route from routing table. How can accomplish this? List Existing Routes To get detailed information about route that will be removed we list the existing routes in our system.

Remove Specific Route This command can be run all modern Linux distributions like Kali, Debian, Ubuntu, Fedora, CentOS. We remove the route by giving specific details...

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How To Add or Change Default Route or Default Gateway in Ubuntu, Linux?

Systems connected to the network will generally access to the internet. In order to access to the internet they need some network configuration like gateway or default gateway. In this tutorial we will examine how to add or change default gateway in Ubuntu, Debian, CentOS, Fedora, Mint, Kali operating systems. List Routing Table Routing table is used to route IP network communication. Hosts generally uses default route to send packages...

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